Lower portion of a substance evaporator



FIG. 1 is a front view of the lower portion with a cap thereon of a substance evaporator showing my new design.

FIG. 2 is a right side view of FIG. 1;

FIG. 3 is a top view of FIG. 1;

FIG. 4 is a rear view of FIG. 1;

FIG. 5 is a left side view of FIG. 1; and,

FIG. 6 is a bottom view of FIG. 1. 

The ornamental design for a lower portion of a substance evaporator, as shown and described. 